Good:
-Nice graphics
-Smooth controls - responsive, with no lag.
-Sound is good
-Mute options (though separate mutes for the music and sound effects would have been best.)
-Female protagonist (Yes, this is a pro. There aren't nearly enough.)
Needs Improvement:
-I have no idea what you're going for with the lighting variations, but it's honestly kind of annoying. It doesn't really add to the difficulty, but it does get distracting. Either use the darkness for something or give us a consistent light source.
-Gameplay gets a bit repetitive - try to vary the challenges and level design more. As is, there are only really two attacks, a handful of different enemies and some spikes. I don't think you even really need to slide. I'd like a bit sharper a difficulty curve, possibly with some powerups or occasional bosses or something - basically anything to give you a sense of progression.
-Is there any way to regain health? I know that the slow health weardown is part of the point, but I'd really like some health potions scattered about.
-A few medals wouldn't go awry.
All in all, a solid little platformer. There's room for improvement, but it was entertaining enough to be worth the time I played. 4 stars.